Ecology Part 1

7. a system of interlocking and interdependent food chains.
8. the natural home or environment of an animal, plant, or other organism
10. the visible features of an area of land
11. animals or plants from another region of the world that don't belong in their new environment.
12. a geographical region in Africa
15. the variety of life in the world or in a particular habitat or ecosystem
16. interaction between organisms or species in which both require a resource that is in limited supply.
17. the world's second-largest and second-most populous continent
18. occurs when animals are exposed to the same stimuli repeatedly, and eventually stop responding to that stimulus
19. an animal that is caught and killed by another for food.

1. takes place when energy moves from one place to another
2. organisms that break down dead or decaying organisms
3. a biological community of interacting organisms and their physical environment.
4. the biological variation that occurs within species
5. the mass or weight of living tissue
6. goal-directed and innate patterns of behavior that are not the result of learning or experience.
8. make up the second trophic level
9. the North American bison
13. an animal that naturally preys on others
14. factor a non-living part of an ecosystem that shapes its environment.